Could be the vc causing the cv joints to go bad. If you replace the cv's, look closely for the signs of a bad vc, otherwise you will be replacing the cv's again.
$550 for cv's??? Did it come with asparin for the pain?
2003 Dodge CTD Quad Cab 4x4, 320k miles and counting
98 ZJ Limited, 5.2L, NP242, Jet Stage II (worthless), K&N, 245/75-16 BFG KO's
89 XJ, stock
79 CJ7 - Options included ripped soft top, leaky 4.2L (5qts/week), ripped seats, 33" tires, bondo & gray primer